Separating or classifying machine



w. A. RIDDELL SEPARATING OR CLASSIFYING MACHINE sep1, 11, 192s.1,683,918

Filed Feb. 11. 1926 Il i; INVENTUM L ffii/mdde zz, I BY# l I ATToRNPatented Sept. 11, 1928.

UNITED STATES PATENT oFFi-CE,

WILLIAM A. RIDDELL, or FREDERICK,v MARYLAND, Assieiion'ro THE rRnDERrCKJSR-0N a STEEL coMrNY, or LAND.

FREDERCK, MARYLAND, A maremma 0F MARY- SEPARATING OR CLASSIFYINV'GMACHINE.

Application led February 11, 1926. `Serial No. 87,656.

My invention relates broadly to separating or classifying machines forgrading material into selected sizes and inoi'e particularly tov aconstruction of classifying machine employ-k ing roller meinbei's havingwear resisting sur faces constructed for operation with matei'ial ofdiffering characteristics.

One of the objects of my invention is to provide a separating machinehavinfi' a plus rality of longitudinally extending spaced. i'ollei'members which ai'e provided with wear resisting surfaces for preventingWearingl of the rollers under vthe Icontinued abrasive action of thematerial which is passed over the rollers.

Another object of my invention is to provide a construction ofseparating machine in whichv a plui'ality of longitudinally extend ingrollers are provided and sections of weer resisting material securedover the rollers along vthe length thereof for preventing excessive wearand the destruction of individual i'ollers'throughI long and continueduse of the separating machine. s Y

Still. another ob 'ect of my invention is to provide a construction ofseparating or classiHV f flying machine where a plurality of adjustablyspaced apart rollers areprovided With renewable surface members whichmaybe removedor placed uponthe rollers from timeto time for preservingthe efficient operation of the machine.

A further obj ectA of my invention is to pro- `vide a construction ofrollermember for sepa-l rating or classifying rmachines in which a wearresisting envelope may be readilyinserted over the roller member forprotecting the roller member against wear and enabling the surface ofthe rollermember to be i'enewed from time to time to avoid the necessityof replacing an entire roller member which normally becomes necessaryafter extended use of the separating machine.

My invention will be moi'e clearly understood from the followingspecification by ref-v ei'ence t-o the' accompanying' drawings, wherein:v

tudinal crosssectional' view taken on line 2 2 of the separating oryclassifying machine illustrated in Figfl; Fig'. 3 is a lateralcrosssectional view taken along' linei-S of the vFigure l is a planviewillustrating thel construction of the separating or classifyingmachine of myinvention; Fig. 2 is a longi separating machine asillustrated in Fig. 2;

Fig 4 is a detail fragmentary view partially in cross-section throughone of the longitudinal roller'members illustrating onemethod oflsecuring the wear resisting enevelope over v the surface of therollers; Fig. 5 is a cross# sectional view of the rollerconstruction'illus trated in Fig. 4 taken on line 5 5 thereof;

Fig. 6 is a view of one of trie rollers partially broken away and insection illustrating ay modified construction by ywhich the Wearresisting envelope may 'be secured over the roller member; and Fig, 7 isa cross-sectional View through the roller member of 6 taken on line7,--7 thereof.

I have found that-the usual steel rollersiof Y a separating orclassifying machine, after vhaving once been set in spaced relationshiptend to wear away under. the continued abra,- sive actionof the materialpassing through the coal separator and ultimately it becomes necessaryto replace an entire roller. These replacements are yinherentlyexpensive and inconvenient and Where spares are not immediatelyavailable, result in undersired shut.' down of the machinery 'withresulting over,- head expense. By my-invention, I proyide a plurality ofremovable sections which form envelopes for thel rollers oftheclassifying ci'uing in the operation of the machine by rea son of theyieldable characteristics ofthe inavteri'al,` permitting passage .ofslightly ovei'- Asize particles of the substance which is being operatedupon-by the classifying machine.

Referring to the drawings in more detail. reference character 1ydesignatesaI ,pa-ir of side frames which havesecured thereto, adjacenttheir extreinities, front bearing carrier 2 and rear bearing carrier 3by any suit,-

ablemeans such as bolts 4. The frame isprovided at the front bearinglcarrier 2 with an extension 5 for housing the dust and dirt proof shaftmember 6 journaled in bearings carried bythe frame of the classifyingmachine. The shaft member 6 is driven by a belt 8 which passes over thepulley 7 or any other suitable driving source may be provided where itmay be more expedient. The shaft member 6 within the gear case housing 5carries bevel gears 9 keyed thereonwhich mesh with bevel gears 10 on theextremities of rotatable'shaft members 11. The rotatable shaft members11 are'journaled in bearings 12 in the front bearing carrier 2 and inbear-v ings 13 in the rear bearing carrier 3. The shaftniembers 11 areprovided with roughened or irregular shaped surfaces or with projections14: extending therefrom in different directions along the lengththereof. These projections 14 engage the inner surfaces of the sectionalsleeve members 15 which form the longitudinally extending` rollers 16.The rollers 16 are spaced apart throughout their length for distancesdetermined by the setting of thesets of adjustable bearings 12 and 13 inthe front bearing carrier f2 and the i'eaiI bearing carrier 3, inaccordance with the desired grading or size of the material which isoperated upon by the classifying machine. A hopper is provided over therollers 16 by means of side plates 18 and the chute 17.l

The lrollers ai'e normally positioned in .an inclined plane so thatmaterial which is distributed ovei the rollers tends to travel'agitation and lrota-tive movement thereof;

In order to secure the wear resisting surface sections 15 on thelongitudinally extending shaft members 11 various forms of retainingmea-ns may be provided between the shaft members and the rollers.v InFig. 4, I have shown a modified form of section for one of the shaftmembers,` where a. polygonal cross-section QOis provided with surfaces21 which lock with correspondingly shaped inner surfaces of the wearresisting envelope 22. In Fig. 6 I have illustrated another method ofconstructing the longitudinally extending rollers where the shaft 28 isscrew threaded adjacent its opposite ends and provided with a squarecross-section 25 intermediate the screw vthreaded portionsV squaresleeve'me-mber 26 fits over the square shaft member 25 and carries thewear resisting material 27 which -is securely locked upon the shaftmember by means of nut and washer members 29 and, 30 engaging the screwthreaded portions of the shaftQS.

It will be observed that white iron coverings for the rollers may bereadily placed upon or removedy from the rotatable shaft members bymerely removing one of the shaft members from its bearings. Sections ofthe lustrated in the drawings has been found to be veryl practical inthe separating of coal into selected sizes. I/Vhile the apparatus asshown has lbeen particularly designed for use as a coal separator itwill be Lunderstood that the machine may be applied to the separation ofvarious materials wherever it is necessary to selectively grade'material into different sizes.

I have illustrated certain preferred ein bodiment-s of the inventiombutI desire that it be understood that modifications mav be made and thatno limitations upon the invention are intended other than those imposedby the scope of the appended claims..

4Wliat I claim and desire to secure by Let-*rV ters Patent of the UnitedStates is as follows: i

1. A separating or classifying machine comprising in combination a.frame, a plurality of rotatable shaft members journaled in said frameandextending. longitudinally therein in spaced relationship, sleevemembers having irregularly shaped surfaces and a plurality ofwear-resisting tubular members having a plurality of independent alignedsections positioned over said sleeve members kfor directly engaging thematerial which is deposited upon the classifying .machine. Y

2. In a separating or classifying machine the combination of a. framestructure, a pluralityV of rotatable shaft members j'ournaledlongitudinally in said frame structure, a drive' shaft ournaledtransversely in said frame structure for imparting rotative movement tosaid shaft members, sleeve membersenveloping said shaft members andhaving exterior gripping surfaces thereon and a plurality of independentsections `constituting removable wear-resisting.surfaces secured uponsaid sleeve members for directly contacting with material to beclassiiiedduiing the passage thereof over said shaft members.

3. In a separating or classifying machine the combination of a'framestructure, va plu-A rality of members each polygonally shaped incross-section journaled longitudinally in said frame structure,means'fo'r imparting rotative movement to saidfm'embers,` sleeve.`members extending over said aforementioned members and having innerbores correspondv.ing to the shape of the external surfaces ofv saidvaforementioned 'Vmembers and wea-rprotecting surfaces extending overeach Lof said sleeve members for preventing direct contact between thematerial which is to be classified and said p'olygonally shaped memiiobers during the operation of said classifying machine.

4. In a separating orclassifying machine the combination of a framestructure, a plurality of roller members journaledL longitudi nally insaid frame structure, means for imparting rotative movement to saidroller members, sleeve members having their inner bores keyed to saidroller members and wearprotecting surfaces constituted by a plurality ofindependent sections extending over each of said sleeve members, saidsections of said Wear-protecting surfaces enveloping said roller membersand having means between the inner surface of each of the sec-tionsthereof, and the outer surface of said roller members for preventingrrelative rotative movement between said Wear-protecting surfaces andsaid sleeve members, said Wear-protect ing surfaces preventing abrasiveaction of the material being classified against said roller members.

5. In a separating or classifying machine a frame structure, aplurality7 of longitudinally extending rotatable rod members journaledin said frame structure, each of said rod members being hexagonal incross section, and a plurality of vindependent sections of Wearresisting material enveloping said hexagonal shaped rod members5 each ofsaid sections having a substantially cylindrical surface arranged tolform an extended cylindrical roller, said vsections of material 'beingaligned upon said rodl members fox` pre-

